package com.atguigu.eduservice.controller;


import com.atguigu.commonutils.R;
import com.atguigu.eduservice.entity.EduTeacher;
import com.atguigu.eduservice.entity.vo.TeacherQuery;
import com.atguigu.eduservice.service.EduTeacherService;
import com.atguigu.servicebase.exceptionhandler.GuliException;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * <p>
 * 讲师 前端控制器
 * </p>
 *
 * @author testjava
 * @since 2021-01-27
 */
@Api(tags = "讲师管理")
@RestController
@RequestMapping("/eduservice/teacher")
//@CrossOrigin
public class EduTeacherController {

    //注入service
    @Autowired
    private EduTeacherService eduTeacherService;

    //1、查询讲师表的所有数据。rest风格
    @ApiOperation(value = "所有讲师列表")
    @GetMapping("findAll")
    public R findAllTeacher(){
        List<EduTeacher> list = eduTeacherService.list(null);
        return R.ok().data("items",list);
    }

    //2、删除方法
    @ApiOperation(value = "根据ID删除讲师")
    @DeleteMapping("{id}")
    public R removeById(
            @ApiParam(name = "id", value = "讲师ID", required = true)
            @PathVariable("id") String id){
        boolean flag = eduTeacherService.removeById(id);
        if(flag){
            return R.ok();
        }else{
            return R.error();
        }
    }

    //分页方法
    @ApiOperation("分页讲师列表")
    @GetMapping("pageTeacher/{current}/{limit}")
    public R pageListTeacher(@PathVariable long current ,@PathVariable long limit){
        //创建page对象
        Page<EduTeacher> pageTeacher = new Page<>(current,limit);

        try {
            int i=10/0;
        } catch (Exception e) {
            //执行自定义异常，因为是有参构造，要输入参数。
            throw new GuliException(20001,"执行了自定义异常处理..");
        }

        //调用方法实现分页，数据都封装到了pageTeacher对象中。
        eduTeacherService.page(pageTeacher,null);

        long total = pageTeacher.getTotal();//总记录数
        List<EduTeacher> records = pageTeacher.getRecords();//数据list集合

        //方法一
//        HashMap<String,Object> map = new HashMap<String,Object>();
//        map.put("total",total);
//        map.put("rows",records);
//        return R.ok().data(map);

        //方法二
        return R.ok().data("total",total).data("rows",records);
    }

    //条件查询带分页方法
    @ApiOperation("条件查询带分页")
    @PostMapping("pageTeacherCondition/{current}/{limit}")
    public R pageTeacherCondition(
            @PathVariable long current,
            @PathVariable long limit,
            @RequestBody(required = false) TeacherQuery teacherQuery){

        //创建page对象
        Page<EduTeacher> pageTeacher = new Page<>(current,limit);


        //构建条件
        QueryWrapper<EduTeacher> wrapper = new QueryWrapper<>();
        //多条件组合查询
        //判断条件值是否为空，如果不为空拼接条件
        String name = teacherQuery.getName();
        Integer level = teacherQuery.getLevel();
        String begin = teacherQuery.getBegin();
        String end = teacherQuery.getEnd();
        if(!StringUtils.isEmpty(name)){
            //构建条件-模糊
            wrapper.like("name",name);
        }
        if(level!=null){
            // level!=null：level不可能为0，因为Integer默认初始值为0，所以判断非空。
            //等于
            wrapper.eq("level",level);
        }
        if(!StringUtils.isEmpty(begin)){
            //大于等于
            wrapper.ge("gmt_create",begin);
        }
        if(!StringUtils.isEmpty(end)){
            //小于等于
            wrapper.le("gmt_create",end);
        }

        //排序（给wrapper多加了一个条件：按照创建时间倒序排序）
        wrapper.orderByDesc("gmt_create");

        //调用方法实现条件查询分页
        eduTeacherService.page(pageTeacher,wrapper);

        long total = pageTeacher.getTotal();//总记录数
        List<EduTeacher> records = pageTeacher.getRecords();//数据list集合
        return R.ok().data("total",total).data("rows",records);
    }


    //添加讲师的方法
    @ApiOperation("添加讲师")
    @PostMapping("addTeacher")
    public R addTeacher(@RequestBody EduTeacher eduTeacher){
        boolean save = eduTeacherService.save(eduTeacher);
        if(save){
            return R.ok();
        }else{
            return R.error();
        }
    }

    //根据讲师id进行查询
    @ApiOperation("根据讲师id查询")
    @GetMapping("getTeacher/{id}")
    public R getTeacher(
            @ApiParam(name = "id", value = "讲师ID", required = true)
            @PathVariable String id){
        EduTeacher eduTeacher = eduTeacherService.getById(id);
        return R.ok().data("teacher",eduTeacher);
    }

    //讲师修改功能
    @ApiOperation("讲师修改功能")
    @PostMapping("updateTeacher")
    public R updateTeacher(
            @ApiParam(name = "eduTeacher", value = "必须加上id", required = true)
            @RequestBody EduTeacher eduTeacher){
        boolean flag = eduTeacherService.updateById(eduTeacher);
        if(flag){
            return R.ok();
        }else{
            return R.error();
        }
    }
}

